Improvement in fire-grates for steam-boilers



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s. REGAN. FIRE-GRATES 'FOR STEAM-BCJILERS.` 194.263.

Grates and their said chain-grates sIMoN REGArLfoF Bow, ENGLAND, Assicnon.oFoNn-HAnnyHis f j A'rHoMAs enMMnnL, 1orfBAIrrnnonn,MARYLAND y li|Mi=iaovrsmism' .il Specification forming part of Letters Patent No.194,263,"datdAugustlll, 1 i 1V V l `Apri127, 1877; patented in England, December `8, 1874, for fourteen years. y 1N i 1 l l WW1" IW i," u

To allwhom t mag/concern:

l Be it known that I, SIMON REGAN, in"thecounty of Middlesex,England, engineer, have invented certain Improvements.`

Boilers and other Heating Apparatus, of which the following is a specification; and I do hereby declare that clear, and exactdescription of my said invention, reference being had to the accompanying drawing, and totheletters of reference marked thereon. l

This invention relatesto certain improvel ments described in LettersPatentof Great Britain, numbered 4,218, granted to moon the 8th day of December, A. D. 1874.,and entitled Boilers and Furnaces.

`My invention has reference to the grates whichconsist of series of grate-barsattached together at their form continuous ends in such lm`al`1ner'as'to or endless-chain grates, the revolving over rollers, the front ones of which4 are driven by means of suitable gearing, to which steam or other Apower is applied.

My invention further has reference to the grate-charging devices, or the mechanism whereby the fuel is introduced to the chaingrates, and to certain attachments to the furnace and to the chain-grates before alluded to, whereby their eciency in operation is secured.

1n the further description of my invention which follows, reference is made to the accompanying drawing, forming a part hereof, and in which* Figure 1 is a longitudinal section of a part of a boiler provided with my improvements. Fig. 2` is a partly-sectional plan of the boiler` and attachments. Fig. 3 is a side elevation of parts of the improvements; and Fig. 4 is a front view of the invention, a portion of the same being shown in section. Figs. 5, 6, and 7 are views on an enlarged scale of portions of the chain-grates and their attachments.

Similar letters of reference indicate similar parts in all the figures.

A is the shell of the boiler, and B B are the ues, extending within the same from the front head C thereof, to which they are secured. The endlesschain grates before alluded to consist of series of grate-bars a, hinged toin Fire Attachments as Applied tol `in the same is containeda full,

l that is lto say,

gether attheir ends,` a

; 151GB@ TQ 77 ,appliance ined ju'd ubiitd fatally mansfof 'the-revenue shafts lD D'` .g1 consist of bars havin g projectionson either sidetL which; when two bars are placed together," a fj mutually disposed andarranged," a`s`,shown-,"`

' the,projectionsiuone'sideypf h one barextend betweenthe projections on the .1 oppositeside of the adjoiningbarlthus, vsrfhile `decreasing the area of jthe spaces betweenthefi bars, giving awell-diused "draft-"area1 ,to the entire grate, and producinganeicellentsupport for ininu The llbersw .more particularlyinFigs.

te particlejvsoffv coal on otheri are flinked together,` asf n shown A f5, `6, and f7 ,each han` `"at one sidewith single tongues bein g provided 'and "at the other side with' "double itongues or passing through the tongues and grooves, which parts, whenthe bars are fitted' to each other,

are interlocked by means of pins grooves, and through bosses at the sides of the double joints, as shown in the said figures of the drawing.

Castings F secured within dues, and curved over the rear shaft D of the chain-grate, serve as bridge-walls or deflectors, to partially close or contract the area of the flues, and thereby concentrate the h eat from the burning fuel upon the upper inner surfaces thereof. The construction of the ends of the grate-bars a is shown in Figs. 5, 6, and 7, and it will be seen that they are connected together by means of pins b, which allow the bars to pass freely around the shafts D D. The shaft D are located within boxes E, bolted or otherwise secured to the front of the boiler, and are each revolved by means of a system of gearing from the outer end thereof. This gearing consists of a wormwheel, c, fastened to the shaft D', and driven by a worm, d, on the countershaft e. The shaft e carries a worm-pinion, f, which is revolved through the medium of a second counter-shaft, g, and a second worm, h, secured thereon. The motion ofthe shaft D is communicated to the chain-grates by means of prongs 'i extending from the said shafts, which prongs, as they are revolved, come in contact with the grate-bars. Steam-power is preferably used to operate the chain-grates. The second counter-shafts are therefore provided with cone-pulleys, to he used in connection with a the shafts,

driving --belt E' l" are charging doors or dampers,adapted to have a vertical movement within the boxes E, a portion of each of which is adapted as a receptacle for a supply of coal.

The chargingdoors are elevated to allow of the .admissionV of having been lled andthe chaingrates set in:l

motion, the charging -doors are elevated to suchheight as willadmit of the deposit of a layery ofV coal uponthe grates of the required thickness. The coal isv thus-carried alongthe flues,the speedvof the grates being such as to allow of the coal beingreduced to ashes before its deposit to the lower portion of the flues by the passage of; the grates around the shafts D. Havingthus describedmy invention, what I claim as new, and wish to secure by Letters Patent ofthe United States, is-

1. rllhe endless-chain grate consisting of thel series of grate-barsa, hinged together at the several points bthe longitudinal grate-supportsD, and the shafts D D', having prongs t', engaging the chains, as shown, combined e in a boiler with a mechanism imparting movenient to the chain-grates, substantially as specified. i

2. Combined in' a boiler, an endlesschain grate consisting of grate-bars, hinged together as specified, a front inclined fuel receptacle or feeder, and avertically-adjustable feedingdoor, as described. u v v 3. .The endless-chain grate of 'the' boiler, combined withthe longitudinal supports D and the screws lo, workin g in threaded projections thereon, and adjusting the shaft Dl of thesaid endless-chain grate, substantially as described.

4. The endless grate consisting of a series of grate-bars linked together, substantially in vthe manner specified, combined in a boiler with a moving mechanism, consisting of the worm-wheels c, d, f, and h, and shafts D', e,

and g, the latter carrying thedriving-pulley, as shownand described.y

5..'1he grate-barsc, havingprojections at either side'thereof, and tongued and grooved joints for attachment to each other,.as speci.- ed. f y

. 6. The combination of a series of grate-bars, a, having interjacent projections and ton gued and grooved joints, with pins for vmaking the said series of bars endless when attached,as`

' described, and for the purpose specified.

In testimony whereof I have hereunto subscribed my name this 27 th day of February, in the year of our Lord 187,7.

Witnesses: f Y

J AMEs JOHN LnooRY, AUG. L. PIGAUD,

Clerks to vMessrs.-(lmmwff')'rdA cfa 0o., Public iNotawes, 7 Takealwuse Yerd,London. 

